Sexuality and gender play a profound role in shaping identity, but for much of human history how they are determined has remained obscure. How does sexual orientation develop? What is it? Can it be changed?

There are many types of telescopes used in astronomy, but X-ray telescopes offer a view of the cosmos that reveal just how much of a living ecosystem the universe is. …

Astronaut Woody Hoburg and leading planetary scientists join Brian Greene to explore ambitious new missions set to propel humanity deeper into space and sharpen our quest to discover life beyond …

Time allows us to live in the moment, reflect on the past, plan for the future. It’s our most familiar, precious, yet mysterious commodity.

What’s it like to face a faceless world? Acclaimed neurologist Oliver Sacks once apologized for almost bumping into a large bearded man, only to realize he was speaking to a mirror.

Meet roboticist Heather Knight and explore the interactive robotic experiences she has created, which include a giant Rube Goldberg machine and a wise-cracking robot, Data, who performs a stand-up comedy …